50 citations · 197 across the 22 of their papers we have counts for
22 papers
Gravitational versus magnetohydrodynamic waves in curved spacetime in the presence of large-scale magnetic fields
Kostas Kleidis, Apostolos Kuiroukidis, Demetrios B. Papadopoulos
The general-relativistic (GR) magnetohydrodynamic (MHD) equations for a conductive plasma fluid are derived and discussed in the curved spacetime described by Thorne's metric tenso…
Gravity Beyond Einstein? Yes, but in Which Direction?
Demosthenes Kazanas, Demetrios Papadopoulos, Dimitris Christodoulou
We present qualitative arguments in favor of an extension of the theory of the gravitational interaction beyond that resulting from the Hilbert-Einstein action. To this end we cons…
Probing dark fluids and modified gravity with gravitational lensing
L. Perivolaropoulos, I. Antoniou, D. Papadopoulos
We generalize the Rindler-Ishak (2007) result for the lensing deflection angle in a SdS spacetime, to the case of a general spherically symmetric fluid beyond the cosmological cons…
The magnetic Rayleigh-Taylor instability around astrophysical black holes
Demetrios Papadopoulos, Ioannis Contopoulos
We investigate the development of the magnetic Rayleigh-Taylor instability at the inner edge of an astrophysical disk around a spinning central black hole. We solve the equations o…
Propagation of gravitational waves in an expanding background in the presence of a point mass
I. Antoniou, D. Papadopoulos, L. Perivolaropoulos
We solve the Laplace equation describing the propagation of gravitational waves in an expanding background metric with a power law scale factor in the presence of a…
Generating Solutions to the Einstein - Maxwell Equations
I. G. Contopoulos, F. P. Esposito, K. Kleidis +2
The Einstein-Maxwell (E-M) equations in a curved spacetime that admits at least one Killing vector are derived, from a Lagrangian density adapted to symmetries. In this context, an…